r. by bad luck
adv. 恐怕, 不幸的是
1. Unfortunately, I can't attend the meeting tomorrow.
不幸的是,我明天不能参加会议。
2. Unfortunately, it started to rain just when we were about to leave.
不幸的是,当我们准备离开时,开始下雨了。
3. Unfortunately, the restaurant was closed when we arrived.
不幸的是,当我们到达时,餐厅关门了。